test: wait for reattach before initial break on run #4792

Job	Run time
Build slim tarball	2m 8s
aarch64-darwin: with shared libraries	16m 50s
x86_64-darwin: with shared libraries	31m 17s
aarch64-linux: with shared libraries	18m 18s
x86_64-linux: with shared libraries	21m 54s
	1h 30m 27s

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